Schou-Bredal I, Bonsaksen T, Heir T, Skogstad L, Lerdal A, Grimholt T, i in. Optimists report fewer physical and mental health conditions than pessimists in the general Norwegian population. HPR [Internet]. 7 marzec 2019 [cytowane 24 listopad 2024];7(1):9-18. Dostępne na: https://czasopisma.bg.ug.edu.pl/index.php/HPR/article/view/7920